- 1Proposed
- 2Under Assessment
- 3Preliminary Assessed
- 4Assessed
- 5Published
Gyalecta ulmi (Sw.) Zahlbr.
- Scientific name
- Gyalecta ulmi
- Author
- (Sw.) Zahlbr.
- Common names
Elme-hulfrugtlav
almelav
almlav
Гиалекта ильмовая
Gobu gialekta- IUCN Specialist Group
Lichens- Kingdom
- Fungi
- Phylum
- Ascomycota
- Class
- Lecanoromycetes
- Order
- Ostropales
- Family
- Gyalectaceae
- Assessment status
- Dormant
- Proposed by
- Anders Dahlberg
- Assessors
- André Aptroot, Göran Thor
- Contributors
- Christoph Scheidegger, Sergio Perez-Ortega, Thomas Læssøe, Toby Spribille, Alexander Paukov
- Comments etc.
- Anders Dahlberg, Tiina Randlane, Sonia Ravera, Matthias Kaltenböck
Assessment Notes
Taxonomic notes
Why suggested for a Global Red List Assessment?
An earlier rather common but rapidly declining species. The Dutch elm and ash dieback diseases are major threats.(Proposed by Göran Thor).
Suggested assessment by proposer:: VU on the A criterium (A2bc+3bc+4bc), population decrease 45 (40-90) % over 100 years.
Geographic range
Gyalecta ulmi is widely distributed on deciduous trees in most of Europe eastwards to Caucasus.
Population and Trends
The species has decreased rapidly and is red-listed in e.g. Austria, Finland, Germany, Norway, Sweden and Switzerland.
Population Trend:
Habitat and Ecology
The species is found mainly on Fraxinus spp. and Ulmus spp., very rarely on other tree species or on calcareous rocks or dolomite. It is mainly found in open forests as wooded meadows and is more common on pollarded trees.
Threats
The Dutch elm disease and the ash dieback disease are major threats. The species is most probably also sensitive to air pollution.
Conservation Actions
Remaining large populations should be protected. Focus should be on the populations on rocks and other tree species Fraxinus spp. and Ulmus spp.
Research needed
Use and Trade
Bibliography
ArtDatabanken. http://www.artfakta.se/Artfaktablad/Gyalecta_Ulmi_738.pdf
The Information System on Italian Lichens. http://dbiodbs.univ.trieste.it/italic/italic03
Rote Listen Deutschland. http://www.bfn.de/0322_rote_liste.html
Red Lists: Threatened species in Switzerland. http://www.bafu.admin.ch/publikationen/publikation/01688/index.html?lang=en
Red List of Endangered Lichens in Austria. http://www.uni-graz.at/~hafell/redlist.htm
